Molding-machine.



' m. 55,824. PATBNTBD JULY 1o, 1906.

s. GRIFFITH.

MOLDING MACHINE.

APPLICATION FILED S521'. 2,8. 19(15.

JNI/ENTOR am 1in-ing..

No. 825.824. PATBNTBD JULY 1o, 1906. s. GRIFFITH.

MOLDI-NG MACHINE.

APPLIoA'rIoN FILED snm'. ze. 190s.

2 SHEETS-SHEET 2.

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.liftthe UNITED STATES PATENT OFFICE.

Specification of Letters Patent.

Patented J'luly 10, 1906.

l.Application iled September 28, 1905. Serial No. 280.551.

To all whom it may concern:

Be it known that I, STANTON GRIFFITH, a citizen of the United States, residing at Beloit, in the county of Rock and State of Wisconsin, have invented new and useful Improvements in Molding-Machines of which the following is a specication.

This invention is a machine used for making sand molds for castings, and comprises means for supporting a pattern in the Hasksection and for stripping same therefrom, the strip ing-plate being spring-actuated to dash-section from the pattern when the mold is completed. Improved means are provided for holding the strip ing-plate and flask-section thereon down to tlie pattern when molding and for releasin said means and allowing the s rings to lift ie strippingplate when the mo dis ready.

In the accompanying drawings, Figure 1 is a side elevation, partly in section, of the machine with the stripping-plate raised. Fig. 2 is a similar view with'the stri ping-plate pressed down. Fig. 3 is an enti) elevation,

vpartly in section. Fig. 4 is a plan showing the trips and lever for releasing the sprmgcatches. Fig. 5 is an edge view of the same.

Referring specifically to the drawings, 6 indicates a base upon which the machine is supported. Mounted upon the base is a baseplate 7, upon which is blocked lup and supported the attern-plate 8, carrying the attern 9. T e strip ing-plate is indicate at 10, and receives t e ask-section thereon. The stripjlip-plate has the usual openin through w c the pattern may be advance or retracted. Depending from the strip ingplate, preferably at the corners thereo are ong bolts 1 1, around which are coiled springs 12 in compression between the under side of the stripping-plate and the u per side of the baselate 7. These bolts and springs are inclose in tubular telesco ing casings formed of sections 13, xed to the under side of the stripping-plate, and sections 14, fixed to the upper side of the base-plate, and these tubes act as guides for the up-and-down movement of the stripping-plate, and so keep the same true and in exact osition with respect to the pattern. Secure to the under side of the ase-plate 7 are tubular guides `15, which are in line with the guides above mentioned and through which the bolts 1 1 work. Said bolts carry stop-nuts 16, which strike the ends of the tubes 15, and thus stripping-plate.

stop the lift of the Depending from the ends of the strippingplate 10 are spring-catches 17, which are preferably located to snap and hook under the ends of the base-plate 7. These catches are disengaged from the base-plate by means of trips, each of which consists of a cranked rod, which swings in a fixture 18, one end 19 of the rod being located under the end of the base-plate in position to lie behind the hook when the same is en aged and the other end 20 projecting upwar ly and connected by a wire 21 to a trip-lever 22. Springs 23, connected to the arms 19, serve to retract the tri s.

n the operation of the machine the aslc,

section-either the cope or the dra is placed on the stripping-plate and forced own therewith, compressing the springs 12 and engaging the spring-catches, under the baseplate. This holds the stripping-plate and flask-section down, with the pattern projecting throu h the hole in the stri ping-plate and into tIie iask. The sand is t en put in.' When the mold is complete, the trip-lever 22 is thrown, causing the trips to disengage the catches, allowing the springs to raise the stripping-plate and fiask and to clear the pattern, which remains stationary.

The device being spring-actuated dispenses with all outside power for effecting the stri ping o eration. Adjustment to limit tiie ift of t e stripping-plate may be effected by changing the stop-nuts 16. The s rings and guides are inclosed and protected rom sand, as shown. The machine is shown with four springs and guides; but this number may be increased, if desired.

What I claim as new, and desire to secure by Letters Patent, is

1. In a moldin machine, the combination with a base and iixed pattern-plate thereon, of a strippinglate slidable up and down in guides on the ase, and having catches engageable with the base to hold the stri pingpate down, and springs tending to lift said p ate.

2. In a molding-machine, the combination with a base having a pattern-holder thereon, of a stripping-plate movable up and down over the attern, tubular guides between the base an stri ping-plate, sfprings coiled in said guides an tending to li t said late, and catches en ageable between said lbase and plate, to ho d the latter down.

3. In a molding-machine, the combination with a base-plate having a pattern-holder puns. rmx

IOO

thereon, of a stripping-plate movable up and down over the pattern, tubular telescoping guides between said plate and base, bolts exdownwardly from said strip ingtending plate and through the guides and the aseplate and having stops on the under side thereof, springs coiled around the bolts in the guides and tending to lift the stripping-plate,

and catches engageable between said plate and the base.

a molding-machine, .the combination with a pattern-supporting base-plate, and a snm-.actuated stnpping-.plate movable up STANTON GRIFFITH.

Witnesses: 4 I -f T. D, WOOLSEY, BENJAMIN EossE. 

